CN101394310B - Apparatus and method for constructing management communication network and signaling communication network - Google Patents
Apparatus and method for constructing management communication network and signaling communication network Download PDFInfo
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- CN101394310B CN101394310B CN2008102255160A CN200810225516A CN101394310B CN 101394310 B CN101394310 B CN 101394310B CN 2008102255160 A CN2008102255160 A CN 2008102255160A CN 200810225516 A CN200810225516 A CN 200810225516A CN 101394310 B CN101394310 B CN 101394310B
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Abstract
The invention relates to a device and a method for constructing a management communication network (MCN) and a signaling communication network (SCN) based on an inband mode. DCC bytes and other reserved overhead bytes in an STM-N frame structure are adopted as a physical passage of a data communication network (DCN) for transmitting management plane information and control plane information, wherein, the physical passage of the MCN of the management plane can be a DCCR (D1 to D3 bytes in an RSOH) or a DCCM (D4 to D12 bytes in an MSOH); and the physical passage of the SCN of the control plane can be a DCCM or other reserved overhead bytes in the STM-N frame structure. Compared with an inband DCN method which only adopts an ECC passage to achieve an Automatic Switch Optical Network (ASON), the bandwidth of the ASON DCN is expanded, thereby enhancing the network performance of the ASON DCN.
Description
Technical field
The present invention relates to optical communication technique, be specifically related to a kind of apparatus and method that make up management communication network and signaling communication network.
Background technology
As the next generation network of transmission field, the appearance of ASON is undoubtedly great breakover point on the optical communication development history.Compare with traditional SDH technology, brand-new ASON technology has not only well solved the network bandwidth dynamic assignment problem that the uncertainty of traffic carrying capacity itself is brought, and promoted the reliability and the survivability of network comprehensively, for the development that transmits net brings vitality.Because commercial ASON equipment all is based on the SDH technology basically, so when the DCN in the ASON network adopts in-band method, not only can directly use existing transmission plane channel, not need newly-built or rent DCN, and be convenient to conventional optical network in the DCN compatibility.
G.8080 advise description according to International Telecommunications Union tissue (ITU-T) to the ASON architecture, DCN in the ASON network is made up of management communication network (MCN) and signaling communication network (SCN) two parts, support distributed management to communicate by letter with signaling, be the network of connectionless-mode, wherein MCN transmits management information for the information interaction between management plane among the ASON and other plane; SCN mainly is the transmission passage that signaling is provided for the distributed control of control plane among the ASON.Signaling transmission passage is between network node and passes through the communication channel that UNI transmits control messages.Control messages comprises signaling message, route messages, control maintenance agreement message such as neighbours and service discovering etc.MCN can use identical physics to transmit passage with SCN, also can adopt different physics to transmit passage.
In the ASON network, the transmission of DCN message has in the band and the outer dual mode of band.DCN can adopt in-band method in ASON, also can adopt out-band method, or both mix realization mutually.In-band method is meant that management information and signaling carry in Embedded Control Channel (ECC) or dedicated channel, wherein the ECC channel is embedded in optical fiber link inside, for example, all purpose communication passage (GCC) among data communication channel (DCC), the OTN and Optical Supervisory Channel (OSC) among the SDH; Out-band method be meant the management and signaling carry by private communication channel, it separates with the optical fiber link of bearer service, for example, external IP network or special circuit.The ASON node will be as " end " node of DCN.
With respect to out-band method, in-band method mainly contains following advantage:
(1) need not extra network service resource, save the construction cost of ASON communication network.
(2) the convenient optical transmission system of having built is integrated, is beneficial to the smooth evolution of network.No matter existing optical transmission system uses the SDH technology, and still OTN technology (comprising dwdm system) all uses the ECC technology to set up DCN (do not have the control plane technology in the certain present optical-fiber network, so DCN mainly transmits network management information, can think MCN).Therefore, the DCN of the ASON of setting up based on ECC, with existing optical transmission system mixed networking in the obvious advantage.
(3) inherit the existing mature technology of SDH, OTN, need not to carry out other exploitation and the adaptive work of interface.
(4) the ECC network link has identical topology with ASON transmission planar network link, is associated mode, therefore can realize transmitting the topology auto-discovery function of planar network easily by ECC.
Because present ASON interface standard, particularly the E-NNI interface standard is also not overripened, interconnecting between the equipment of different manufacturers is unsatisfactory, so the ASON network that present stage is disposed generally selects the equipment of single factory for use, and only needs the networking application mode of single control domain.Under this networking mode, adopt the I-NNI interface interconnected between the ASON node, externally adopt the standard uni interface to connect customer network.In addition, build the outer DCN of band and also need extra networking expense.Therefore, the DCN network mainly still adopts in-band method in the ASON network that builds up or be about to build.
Therefore, DCN in the band in the further investigation ASON network, DCN design in the band that proposes to optimize will help conventional optical network to ASON evolution.
Summary of the invention
One aspect of the present invention proposes a kind of device that makes up management communication network and signaling communication network based on in-band method, comprise the interior communication network of sub-frame of the intra-node communication net and the interior total interface dish of connexon frame of NE management unit, intelligent control unit, interface disc, connection NE management unit and intelligent control unit and each interface plate frame, it is characterized in that:
Interface disc be used for from the frame overhead of SDH extract the DCC byte and the STM-N frame structure chosen the overhead byte of other reservations, with DCC
ROr DCC
MThe network management information of carrying is sent to the NE management unit, with DCC
MOr the signaling management information of the overhead byte of other reservations in STM-N frame structure carrying is given intelligent control unit; Simultaneously, reception is transmitted from NE management unit networks management letter with from the signaling management information of intelligent management unit;
The NE management unit is used for being carried on DCC by direct the reception from the network management information of network management workstation or by interface disc reception and forwarding of webmaster access interface
ROr DCC
MIn network management information;
Intelligent control unit is used for being carried on DCC by interface disc reception and transmission
MOr the signaling control information in the overhead byte of other reservations in the STM-N frame structure;
Communication network provides the communications platform between each parts of intra-node in described intra-node communication net and the sub-frame.
Wherein, the signaling control information is carried in the overhead byte of reserving in the STM-N frame structure communication bandwidth with the expanded signalling communication network.
Wherein, when choosing the overhead byte of other reservations in the STM-N frame structure, can only select the idle bytes among the RSOH, also can only select the idle bytes among the MSOH, can also select the idle bytes among RSOH and the MSOH simultaneously.
Wherein, described idle bytes is the expense that is in first STM-1.
Wherein, the NE management unit adopts DCC
RAs the physical channel of management communication network, adopt the physical channel of the idle bytes of RSOH in the STM-N frame structure as signaling communication network.
The present invention proposes a kind of method based on in-band method structure management communication network and signaling communication network on the other hand, wherein:
Interface disc extracts the overhead byte of other reservations in DCC byte and the STM-N frame structure chosen from the frame overhead of SDH, with DCC
ROr DCC
MThe network management information of carrying is sent to the NE management unit, with DCC
MOr the signaling management information of the overhead byte of other reservations in STM-N frame structure carrying is given intelligent control unit; Simultaneously, reception is handled or is transmitted from NE management unit networks management letter with from the signaling management information of intelligent management unit;
The NE management unit directly receives from the network management information of network management workstation or by interface disc reception and forwarding by the webmaster access interface and is carried on DCC
ROr DCC
MIn network management information;
Intelligent control unit receives by interface disc and transmission is carried on DCC
MOr the signaling control information in the overhead byte of other reservations in the STM-N frame structure.
Description of drawings
Fig. 1 is based on the ASON node communication structure chart of DCN isolation technics in the band;
The section overhead byte schematic diagram of Fig. 2 STM-1 frame;
Relation in Fig. 3 band between interior SCN of MCN and band and the transmission planar network.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
The SDH technology that commercial at present ASON all is based on basically realizes that the SDH network management technology is relatively ripe, and ASON equipment producer is main still based on traditional SDH network management system in the network management system design.The SDH network management system generally adopts DCC
RAs the physical layer of Embedded Control Channel (ECC), transfer operation, administer and maintain information.When design ASON DCN, if use in-band method, with DCC
ROr DCC
MAs the physical channel of management communication network (MCN), with DCC
MOr the overhead byte of other reservations in the STM-N frame structure can realize the compatibility of DCN in ASON DCN and the traditional SDH network very easily as the physical channel of signaling communication network (SCN), and the ECC protocol stack also can adopt the ECC protocol stack in the SDH network simultaneously.Therefore, the networking mode that this in-band management communication network (MCN) is separated with signaling communication network (SCN) has good compatibility with the DCN of SDH, be convenient to adopt management system to upgrade to central controlled mode, realize the compatibility and the smooth evolution of legacy network and ASON network.
ASON node communication structure of the present invention as shown in Figure 1, the ASON node is made up of communication network, intra-node communication net in NE management unit (NMU dish), intelligent control unit (SCU dish), interface disc, the sub-frame.Wherein the NMU dish passes through DCC
ROr DCC
MOr the IP network that is formed by connecting of media such as Ethernet, mainly be to be that the information interaction between management plane among the ASON and other plane is transmitted management information; The SCU dish passes through DCC
MOr the IP network that is formed by connecting of media such as the overhead byte of other reservations in the STM-N frame structure or Ethernet, mainly be the transmission passage that signaling is provided for the distributed control of control plane among the ASON.
Wherein, NMU dish termination DCC
ROr DCC
M, realize the route forwarding function and the OAMAgent function of these signals.
SCU dish termination DCC
MOr the overhead byte of other reservations in the STM-N frame structure, realize the route forwarding function of these signals, handle ASON control signaling, and, connect according to signaling request control interface dish.
Interface disc extracts the overhead byte of other reservations in DCC byte and the STM-N frame structure chosen from the frame overhead of SDH, with DCC
ROr DCC
MDeliver to the NMU dish by certain form, with DCC
MOr the overhead byte of other reservations in the STM-N frame structure is given the processing of SCU dish by certain form; Receive control command, the connection of setting up datum plane.
Communication network and intra-node communication net in the sub-frame: form the high-speed communication local area network (LAN) (ILAN) of ASON intra-node, high speed, high capacity communication platform between each parts of intra-node are provided.
The annexation of each part of ASON node is:
The NMU dish is connected with the entity interface dish of realizing ASON transmission plane function with the intra-node communication net by communication network in the sub-frame, makes interface disc receive and send network management information by communication network in the sub-frame and intra-node communication net;
The SCU dish is connected with the entity interface dish of realizing ASON control plane function with the intra-node communication net by communication network in the sub-frame, makes interface disc receive and send signaling information by communication network in the sub-frame and intra-node communication net;
Network management workstation is connected with webmaster access interface on the node by the network management workstation access link, the reception that the network management information that network management workstation is sent at first coils through NMU, if issue this node, then be linked into the inner management application layer of NMU dish and handle; Otherwise the IP forwarding capability by the NMU dish is sent to its destination node;
Communication network and intra-node communication net are formed the high-speed communication local area network (LAN) (ILAN) of ASON intra-node in the sub-frame, and high speed, high capacity communication platform between each parts of intra-node are provided.
The intra-node high-speed communication system can use any high-speed data communication technology.The ethernet technology that alternative intra-node high-speed communication system technology mainly contains based on the IEEE802.3 standard (comprises 10M, 100M, 1000M ethernet technology, and the ethernet technology that develops again later on), Asynchronous transfer mode technology (ATM), token ring, or the like.Can also use the private data communication technology of equipment manufacturers' exploitation.That is to say, all can use as long as can reach the technology of high-speed bidirectional data communication purpose.
SCU realizes on different hardware platforms respectively with NMU, mainly based on following consideration:
(1) SCU and NMU to hardware performance require inconsistent.Among the ASON, control plane need be realized calling out and the control that is connected, and link road is by calculating, the correlation computations of distribution type restoration and control, therefore to the requirement of disposal ability than higher; Simultaneously, also should consider the permanent storage of control plane information, as network topological information, adjacency state, call state, connection status, or the like; Therefore should be equipped with hard disk or disk array (RAID) among the SCU, support file system.And NMU is simple relatively, does not have complicated calculating and processing, and it needs permanent information of preserving also few, and these information have preservation on the EMS/SNMS of upper strata, only needs to keep getting final product synchronously.
(2) SCU and NMU branch are opened, also having a consideration is that node can be more flexible.Be when not disposing SCU in the node device, this node can be used as a common optical transmission device and uses, and in case when needing to support the ASON function, in node, add join SCU after, remake corresponding configuration, can realize the function of ASON, realize the smooth upgrade of system.
(3) can be on SCU integrated more in the DCN interface.Because operator can provide the external data network of the DCN that is used for making up ASON to have multiple technologies and select.In general, can support the communication technology of DCN function that circuit switching (circuit switch), packet switch (packet switch), local area network technology (LAN), Asynchronous transfer mode technology (ATM), SDH and OTN or the like are arranged; Three-layer technology has the technology of IP technology or OSI(Open Systems Interconnection).With SCU and NMU integrated after, when design of node, can consider to select the platform of supporting multiple two layer interfaces and three-layer technology for use, the data network that operator is provided has better adaptability like this, is very beneficial for the deployment of ASON network.
The fundamental mode of SCU and NMU is: the overhead byte of other reservations in DCC and the STM-N frame structure provides IP-based data transport functions, and the intra-node local area network (LAN) that the communication between intra-node NMU dish, SCU dish, interface disc unit is formed by communication network in the sub-frame and intra-node communication net carries out.
For the SDH system, the passage that uses DCC to communicate by letter with signaling usually as management.In order to guarantee the intercommunication of the equipment DCC of different vendor, equipment must be supported the configurable functionality to the DCC byte.Should support following two kinds of bandwidth selection schemes:
1) DCC among the employing RSOH
R, speed can reach 192kbps;
2) DCC among the employing MSOH
M, speed can reach 576kbps;
When aspects such as network size, number of devices and transfer rate constantly increase, being used to of transmitting on the DCN in band manage, the therefore constantly increase of size of message of signaling and maintenance, finally can since bandwidth not enough cause with in DCN message congested, the network performance reduction.Therefore,, can adopt specified byte to carry out the expansion of bandwidth, for example, utilize the overhead byte of other reservations that the communication bandwidth of 2Mbps or higher rate is provided in order to improve the conveying function of DCN in the fibre ribbon.
Figure 2 shows that the section overhead byte schematic diagram of STM-1 frame.For STM-1, quite every frame has 72 bytes to can be used for section overhead.Because per second 8000 frames, thereby the STM-1 purpose that has 4.608Mbit/s to can be used for the network operation, administer and maintain.The overhead byte of reserving has 42 bytes, and the extra communication bandwidth of 2.688Mbit/s can be provided.
Based on DCN in the band in the ASON network of SDH technology also is the physical transmission channel that adopts the DCC in the section overhead to communicate by letter with signaling as management, and spread bandwidth also can adopt the overhead byte of other reservations in the STM-N frame structure if desired.
When choosing the overhead byte of other reservations in the STM-N frame structure, can only select the idle bytes among the RSOH, also can only select the idle bytes among the MSOH, can also select the idle bytes among RSOH and the MSOH simultaneously.
During the overhead byte of other reservations, these idle overheads must be the expenses that is in first STM-1 in choosing the STM-N frame structure.
When adopting DCC
RPhysical channel as MCN; the idle bytes that adopts RSOH in the STM-N frame structure is during as the physical channel of SCN; not only be convenient to compatibility with original SDH network; and can further improve the performance of SCN; since regenerator section also can treatment S CN signaling information, thereby the monitoring of the protection of end-to-end path faster and recovering.When the DCN network bandwidth requirements is little in the ASON band, can adopt DCC
RAs the physical channel of MCN, adopt DCC
MPhysical channel as SCN; The DCN bandwidth is not enough and cause the congested of DCN message in ASON band, when network performance reduces, can utilize the overhead byte of other reservations in the STM-N frame structure to adopt the bandwidth of expanding MCN and SCN.
Figure 3 shows that and adopt the physics that separates to transmit passage, make up SCN in interior MCN of the band that is independent of each other and the band.They all are to transmit planar network, MCN use DCC in the band
ROr DCC
MTransmit passage as physics, SCN uses DCC in the band
MOr the overhead byte of other reservations in the STM-N frame structure transmits passage as physics, and the two is independent fully, is realized by different entities, is independent of each other.
The present invention has the following advantages and good effect:
(1) uses the physical channel of the overhead byte of other reservations in DCC and the STM-N frame structure, need not extra Internet resources, be very beneficial for the mixed networking of ASON node and traditional optical transmission nodes as the DCN of ASON.
(2) management plane separates the requirement that can adapt to the transmission of control plane fast signalling with the control plane data communication network, makes its not influence on managed plane, as shown in Figure 3.
(3) network topology of SCN and ASON transmission flat topology has consistency, can realize transmitting the topology auto-discovery function of planar network easily.
The above is preferred embodiment of the present invention only, is not limited to the present invention, all any modifications of being made within the present invention spirit and principle, is equal to replacement and improvement etc., all is contained within protection scope of the present invention.
Claims (8)
1. device that makes up management communication network and signaling communication network based on in-band method, comprise the interior communication network of device of NE management unit, intelligent control unit, interface disc, connection NE management unit and intelligent control unit and each interface plate frame and the interior communication network of sub-frame of the interior total interface dish of connexon frame, it is characterized in that:
Interface disc be used for from the frame overhead of SDH extract the DCC byte and the STM-N frame structure chosen the overhead byte of other reservations, with DCC
ROr DCC
MThe network management information of carrying is sent to the NE management unit, with DCC
MOr the signaling management information of the overhead byte of other reservations in STM-N frame structure carrying is given intelligent control unit; Simultaneously, reception is transmitted from the network management information of NE management unit with from the signaling management information of intelligent control unit;
The NE management unit is used for being carried on DCC by direct the reception from the network management information of network management workstation or by interface disc reception and forwarding of webmaster access interface
ROr DCC
MIn network management information;
Intelligent control unit is used for being carried on DCC by interface disc reception and transmission
MOr the signaling control information in the overhead byte of other reservations in the STM-N frame structure;
Communications platform between inner each parts of communication network generator in communication network and the sub-frame in the described device.
2. device as claimed in claim 1 is characterized in that: the signaling control information is carried in the overhead byte of reserving in the STM-N frame structure communication bandwidth with the expanded signalling communication network.
3. device as claimed in claim 2 is characterized in that: when choosing the overhead byte of other reservations in the STM-N frame structure, only select the idle bytes among the RSOH, perhaps only select the idle bytes among the MSOH, perhaps select the idle bytes among RSOH and the MSOH simultaneously.
4. device as claimed in claim 1 is characterized in that: the NE management unit adopts DCC
RAs the physical channel of management communication network, adopt the physical channel of the idle bytes of RSOH in the STM-N frame structure as signaling communication network.
5. one kind makes up the method for management communication network and signaling communication network based on in-band method, wherein:
Interface disc extracts the overhead byte of other reservations in DCC byte and the STM-N frame structure chosen from the frame overhead of SDH, with DCC
ROr DCC
MThe network management information of carrying is sent to the NE management unit, with DCC
MOr the signaling management information of the overhead byte of other reservations in STM-N frame structure carrying is given intelligent control unit; Simultaneously, reception is handled or is transmitted from the network management information of NE management unit with from the signaling management information of intelligent control unit;
The NE management unit directly receives from the network management information of network management workstation or by interface disc reception and forwarding by the webmaster access interface and is carried on DCC
ROr DCC
MIn network management information;
Intelligent control unit receives by interface disc and transmission is carried on DCC
MOr the signaling control information in the overhead byte of other reservations in the STM-N frame structure.
6. method as claimed in claim 5 is characterized in that: the signaling control information is carried in the overhead byte of reserving in the STM-N frame structure communication bandwidth with the expanded signalling communication network.
7. method as claimed in claim 6 is characterized in that: when choosing the overhead byte of other reservations in the STM-N frame structure, only select the idle bytes among the RSOH, perhaps only select the idle bytes among the MSOH, perhaps select the idle bytes among RSOH and the MSOH simultaneously.
8. method as claimed in claim 5 is characterized in that: the NE management unit adopts DCC
RAs the physical channel of management communication network, adopt the physical channel of the idle bytes of RSOH in the STM-N frame structure as signaling communication network.
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| CN101626279B (en) * | 2009-07-30 | 2013-04-17 | 北京星网锐捷网络技术有限公司 | Method and device for improving line transmission bandwidth and network equipment |
| CN101998181B (en) | 2009-08-10 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for sub-network connection protection (SNCP) service migration |
| CN103391231B (en) * | 2012-05-10 | 2017-02-08 | 中国移动通信集团辽宁有限公司 | Networking method and device for data communication network |
| CN103595635B (en) * | 2012-08-13 | 2017-08-11 | 中兴通讯股份有限公司 | Data communication network message forwarding method and device based on packet OTN apparatus |
| WO2014205628A1 (en) | 2013-06-24 | 2014-12-31 | 华为技术有限公司 | Increasing method and decreasing method for variable optical channel bandwidth and device |
| CN108306750B (en) * | 2017-01-13 | 2022-07-01 | 中兴通讯股份有限公司 | Bandwidth control method and system for managing communication network and related equipment |
| CN110635949B (en) * | 2019-09-30 | 2022-07-22 | 瑞斯康达科技发展股份有限公司 | DCC management method for SDH network element, management card and storage medium |
| CN112564977B (en) * | 2020-12-15 | 2022-07-19 | 安徽皖通邮电股份有限公司 | Method for expanding general communication channel of OTN (optical transport network) equipment |
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